#include "RR.h"
#include <stdio.h>
#include <stdlib.h>

/**
 * 函数: calculateTimes
 * 功能: 根据时间片轮转调度算法计算每个进程的完成时间、周转时间和等待时间
 *
 * 参数:
 *  - processes: 指向包含多个进程信息的数组
 *  - n: 进程数量
 *  - time_slice: 时间片长度
 *
 * 描述:
 *  计算进程的完成时间，周转时间和等待时间并存在结构体中即可
 */
void
calculateTimes (Process *processes, int n, int time_slice)
{
  // TODO
  int p = n;
  int i = 0;
  int time = 0;
  while(p > 0) {
    if(processes[i].remaining_time > 0) {
      int t = time_slice < processes[i].remaining_time ? time_slice : processes[i].remaining_time;
      time += t;
      processes[i].remaining_time -= t;
      if(processes[i].remaining_time == 0) {
        processes[i].completion_time = time;
        p--;
      } 
    }
    i = (i + 1) % n;
  }
  for(int i = 0; i < n; i++) {
    processes[i].turnaround_time = processes[i].completion_time - processes[i].arrival_time;
    processes[i].waiting_time = processes[i].turnaround_time - processes[i].burst_time;
  }
}
